01 Tacoma hit a bump and blew many fuses. Replaced all and…

Customer Question

01 Tacoma hit a...

01 Tacoma hit a bump and blew many fuses. Replaced all and now Isolating each component and inspecting wiring and connectors and now blowing ECM Powered fuses. Just got ECM repaired. It had 2? Burned diodes. It still blows the 7.5 amp IGN fuse at the interior fuse panel. I'm a master level technician and so far it is not obvious.

Mechanic's Assistant: Have you checked the manual yet? Most vehicles have two fuse panels.

Mechanic's Assistant: Are you fixing your Tacoma yourself? What have you tried so far?

Yes Ive also unplugged the transmission relay and HVAC control. The cluster was not blowing any fuses when the ECM was out and it seems to operate. The motor will crank but it blows ECM power fuses. This appears to be a pattern failure on this truck. I am reading the information listed on this page and appreciate the help.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

The alternator regulator connector is also unplugged to isolate the "dead short" It was a Clear day when it happed 2 months ago. And when it blew all the fuses, the positive battery terminal seemed to be zapped too. That's all repaired properly now. It is a 2001 v6 manual trans 4x4. 210,000 miles. It cranks but won't fire with no power to the ECM. THANK YOU!

UNPLUGGED IT ,CHECK THE CONNECTOR PINS FOR NY BURNED, SHINE FLASH LIGHT INSIDE THE CONNECTOR TO SEE BETTER

DO YOU HAVE CAPABLE SCANNER ,CAN YOU COMMUNICATE WITH ECM

Ask Your Own Toyota Question

Customer reply replied 6 months ago

Great. I have done a good visual inspection and Yes I can open the links. I will be checkig the circuit continuity and Hoping to find this short tonight. Information is gold. You know this. And by the way I am also Chad. Nice to meet you. The ECM connectors look great. The ecm was sent out and professionally repaired. It had 2 or 3 burned diodes. They gurantee it was ready to be plug and play. Before the ECM repair, The cluster did not blow the fuse when powered up with ECM unplugged. I'm hoping its ok. It lights up warning lights and shows the odometer. So for Help. I am blowing the two fuses still. IGN 7.5 inside the truck and the 20A EFI fuse at the underhood panel. Something is shorting out this ECM I'm about to unplug oxygen sensors or just go for their fuses. I have Alldata at work and printed ecm diagrams and taped them together for a full diagram.

do this if you can, are these fuse blowing as soon as you stic new one in there,if you go a litle higher on fuse it will still blow

do you see the evidence of hit ,on the under the frame, inspect that harness from battery down

oxygen sensor wiring smashed against the fire wall or melted around the exhuast manifold

Battery Drainage Test

1- Voltmeter2- settings on voltmeter will be on milli amps.3- go across all the fuses in the car and see which one is reading higher than 0.3 to 0.5 milli amps4- the fuse drawing more than 0.5 miili amps ,will be the suspected circuit that needs inspection for the drainage.

power at pin 16 of the dlc. It is a manual transmission truck. I have unplugged the transmission relay at the right side kick panel. I can plug the ECM in, connect the battery and it blows the two fuses, IGN inside and EFI underhood when the key is turned to the on position. I'll re inspect exhaust and oxygen sensor wiring. It had a Po420 last year, We repaired a minor exhaust leak at the flange near the catalytic and the codes never returned and it passed the smog test. I did not replace any of the sensors. A/F ratio sensor up front I think?

why cant you unplug it ,is because it is melted on ,or just hard to get the clip to release ?

Ask Your Own Toyota Question

Customer reply replied 6 months ago

It's only the fact I cannot get my hand around it. It is located on top of the manual transmission and My lift is a scissor lift in a garage. I might need to lower the trans. My hands vs a very tight location.

Customer reply replied 6 months ago

My diagram for the ecm is for an automatic transmission Tacoma base model. This is a manual transmission model and appears to not have daytime running lights. Exteded Cab by the way.

Customer reply replied 6 months ago

Like I say. It is a Crank no start condition with blowing the two ecm fuses. Connector E5 pins 1 and 2.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

THANK YOU, THANK YOU, THANK YOU!! I've got my baby back. Tomorrow I will get a tank of high octane, remove the top, go for a long long ride and enjoy my car. THANK YOU!

JugheadUSA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

scion xa replaced alternator belt due to squealing. It was fine then squealed again, tightened it right away and it was fine. Now it is squealing again and is as tight as it can go. Now what?… read more

We changed the alternator in our 2008 Highlander. At the same time we lost our spare key fob. Shortly afterwards the factory alarm (horn) started sounding randomly. The car will be sitting in the lock… read more

I changed my pre cat oxygen sensors and in the process i hit the shift cable on the transmission. now the vehicle shifts hard and is throwing a transmission error code. i displaced the cable approxima… read more

Hi I had new catalytic converter, all new oxygen sensors down stream n upstream engine light went off until I driven car 60miles and the light return and the code is stating po171 and I've checked for… read more

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.